Thopter Engineer is a uncommon Creature — Human Artificer card from Double Masters (2XM), collector number 147. Current market price: $0.27 (foil $0.28), TCGplayer market prices via Scryfall.
When this creature enters, create a 1/1 colorless Thopter artifact creature token with flying. Artifact creatures you control have haste. (They can attack and {T} as soon as they come under your control.)